/* 清除浮动 */
.clearfix::after {
    content: '';
    clear: both;
    display: block;
}

/* 版心 */
.w {
    width: 1226px;
    margin: 0 auto;
}
.pointer:hover{
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
    transform: translate3d(0,-2px,0);
    transition: all 0.3s;
    cursor: pointer;
}

.w::before,
.w::after {
    content: '';
    display: table;
    clear: both;
}